Fix to MPLY-9592: Added check for FloorIndex out of range
Fix to MPLY-9592: Added check for FloorIndex out of range

In good measure, a check "should" be added where this index
was read from the app config. Though that part of the code
will probably won't have enough info about the interior model
(at config load time) to make that check.

Buddy: David Crooks

wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app,eegeo/eegeo-example-app